Well the excretory system produces waste.
The answer would be B. chromosome 21
<h3>Answer:</h3><h2>A Reaction is the rate rate which increases with a decrease in temperature.</h2>
It can be physical or chemical; a physical reaction is the one which occurs as a result to an event i.e. anger, happiness, excitement etc. Where as a chemical reaction is illustrates the process a chemical behaves when mixed with another substance.
Answer:
c.assembling parts of the virus
<span>22 pairs of autosomal chromosomes, 1 X chromosome, and 1 Y chromosome would
</span><span>be expected in a karyotype of a human male</span>
